Well-drill jar.



W. A. SPARKS.

WELL DMLL JAR.

iPPLlGATION FILED a124, 1912.

Patented Aug. 25, 1914 invents-z UNITED STATES PATENT OFFICE.

WILLIAM A. SPARKS, OF ST. MARYS. WEST VIRGINIA, ASSIGNOR TO SPARKS DRILLING JAR COMPANY, OF CHARLESTON, WEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

WELL-DRILL JAR.

. To all whom it concern Be it known that I, .VILLIAM A. SPARKS,

a citizen of the United States. residing at tain new and useful Improvements in Well-.

Drill Jars; and I do hereby declare the following to be a full. clear, and exact descrlption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to well drill jars.

The weakest partof a string of drilling tools has always been the jars and their weakness is generally caused by the welds at each end. which impair the strength of the metal, or by the rivet or screw connection between the parts which complicate the con struction as well as weaken the device.

In employing drillingtools having jars of the usual type. it: is frequently necessary to insert new in drilling a deep well. owing to the wearing of the vital parts of the jars. The jars f the usual type employed by rontriu'tiors are weak at the joints. due to vitiated or dcfrrtive metal or to the construction of the joints. Should a jar of the type (n-dinarily employed become broken during the drilling: operation. the operator experiences considerable trouble in the re rovery of his drilling; tools. requiring an equipment of many t tra tools to reino. e the fractured parts from a well, It is tie (piently impossible to recmcr the broken parts, whereu mn it is necessary to till in. the well and begin d rilling anew. involving eonsiderable financial loss to the contractor. Furthermore. thrdrillino tools often become, locked in a well. or broken by the material caving in the well. the debris clogging the jars.

Th objects of my inventi n are. first. to c nstruct a jar which will give a firm im part: or j-ar": second. whirh is time from weakness at th joints due to welding heatins: of the parts: third. ,which will not become clogged or broken by the debris from the cmhig of the well. and fourth. the (-on stru tion (f-a, jar which will lessen the cost; of the recovery of the broken part from the Specification of Letters Patent.

Application filed January 24, 1912.

Patented Aug. 25, 1914. Serial No. 673,106.

well, thereby saving great sums of money to the contractor.

Further objects are to simplify the construction and thus provide a better article which can be made a great deal cheaper and render service cheaper than the jars now in general use and can, therefore, be sold for less money.

Other objects will become apparent from the following description. I

The invention consists broadly of a set of jars comprising; two members each made of a. single solid piece of metal free from welds The invention also consists in the features of construction and combinations of parts hereinafter described. illustrated in the ac-,

companying drawing, appended claims.

in the accompanying drawing: Figure l is an elevation of a set of jars. constructed in accordance with my invention. illustrated in their contracted position. Fig. 2 is a central longitudinal section of the jars in their extended position. Fig. 3 is a detailed view of the lower member of the jars as it appears before it is attached to the upper member. Fig. 4 is a transverse section on the line of Fig.2. and Fig. 5 is a transand spe ified in the -vcrse section on the line y-y of Fig. 2.

Referring more articularly to the draw ing. 1 designates t e upper member and 2 the lower member ofthe set ofjars there illustrated. The upper member has the usual dcpcnding plunger 3 integral therewith, which is of reduced diameter and terminating at its lower end in the enlargement or ball 4. The ball 4 is preferably elongated. i. 0. having its longitudinal axis preferably greater than its transverse axis. as is shown in Fig. :2, for a purpose to be hereinafter set forth. At the upper end of said plunger there is a circum ferential shoulder 5 adapted to strike the upper cud of the lower or socket member 2 simultaneously with the lower end of the ball upon the bottom of the socket 6 in said lower member.

As illustrated in Fig. 3, the lower member,

before it is attached to the uppermember,

has its socket 6 formed with a rounded base serving as a seat for the ball member, and

with straight and uniform bore to its upper open end, and is provided with an ex cess of metal on the outer surface of its upper end. as at 7. After the two members are assembled by inserting the ball 4. well down into the'soclict (3; the upper end of the lower member, where the, excess of metal 7 is wrovitled, is heated and swaged in around the reduced shank of the plunger 3, forming a rounded sent for the ball member 42 at the upper end of the cylindrical socket, thereby for dog oppositely positioned ball seats in the socket as shown in Fig. 2. When this swaging operation is completed, the lower member is of uniform external diameter to its upper end, as illustrated in Figs. 1 and 2, the ericess of metal being transferred. to

. the inner surface of said upper end, as at 8,

Fig. 2, where it forms a plunger guide or etc and producing on u per rounded ball c which stop limits t e upward move ment of the ball l, thereby retaining the two members in operative connection with one anotherq The hall, as previously stated, is preferably elongated, that is, having its longitudinal axis greater than its transverse axis, the transverse axis being substantially the same as the transverse axis of the cylindrical sordzet. This ball is slidably fitted within the cylindrical socket of member 2, which. combined with the long bearing surface of the socket member contacting with the stem 3, operates to direct the movement of the members of the jars relative to each other to insure the alinement of the head of memher 1 with the wells of socket member2 at all times, thereby precluding wobbling of the jar members during the drilling opera; tion. and eliminating any tendency of the members to become jammed in the well or to cause the caving in of the walls of the well. The employment of a ball member engaging rounded seats at opposite ends of a socket member insures longer life to a set of jars as such construction of the parts prevents the contacting arts of the onoperating members from becoming so bat tered out of shape as to render the set of in inoperative, or at least ai'i'ect the efficiency of the jar. It will thereforebe observed that each set of jars comprises two members of solid metal joined together without splitting the metal, or using welding heat. thereby producing a set of jars of sub-- stantiallv a single solid piece of metal which it is almost impossible to break under ordinary care and use. However. should a set become broken while within a well, it would probably be a separation of the shank 3 from the head 1, or the ball lfrom the shank, in which event the hell would drop down into the socket. making it an easy fishing operation to recover the parts lost in the well. as will be readily understood by hi .i iillell in the :irt. it will be observed, furtbcn that the provision oi. the bull and socket connection. such as de cribed herein. permits of :1 turning or rotating; movement as well "the usualreciprocating movement of the jar members relative to each other, thereby relieving the jars of torsional Strains. It is preferred to equip the soeltct mei'nber with exit ports or enings 9 for the purpose of ire ng the soc of any waiter, slush, or other foreign mat ter that may p therein between the shank 3 and the bearing 3.

I claim:

1. A set of drill comprising two mcnn bers each made of :1 single solid piece of metal entirely free from welds and united by a. ball and socket joint, the socket being imperfornte except for a waste opening at one end thereof".

A set of drill jars comprising an upper member having: 5 depending plunger provided with a ball near its lower end. a lower member having a socket, for said ball. and an integral stop near the upper end of said socket for limiting: the upward movement of said bell and retaining the two members in operative connection.

3. A set of drill comprising two members connected by 2 ball and socket joint. capable of reciprocqting and rotating movel ments.

4. A set of drill "Ems comprising twomem hers each mode of a single piece of metal free from welds. one of said members being provided with a socket. and the other of said members with a ball integral therewith. said ball being completely housed by said socket,

5. As a new article of manufacture, ajar for well-boring comprising two members of solid metal. one of said members having a, ball integral therewith, and the other of said members being provided with a socket having rounded seats at opposite ends there. of, said rounded seats conforming substantielly to the portion of the ball with which they engage.

ll. set of drill con'aprlsing inn upper member and a lower member, each mode from a single piece of metal free from welds, the upper member having a depending plunger and an elongated ball integral therewith. the lower member comprising a sub stanliully cylindrical socket adapted to incase said elongated ball, said socket having rounded ball seats at each end thereof.

7. A set of drill jars com risingtwo members, one of said members aving a plunger and an elongated ball integral therewith, and the other member comprising a substantially cylindrical socket, adapted to completely house said elongated ball, and a,

hot

st0p f0rming a plunger guide, said socket having rounded ball seats at each end thereof, said plunger and elongated ball of one member coiiperating with said plunger guide and the walls of the socket of the other member to retain the vertical alinement of ihe members.

WILLIAM A. SPARKS.

Witnesses:

L. P. \VALKER, 

